Data Storage

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Data Storage

A magnetic tape is a device of data storage which typically stores digital information.

The tape uses digital recording methods and is usually shaped as a cassette or a Cartridge. The tape driver is a device that usually records the data on to the magnetic tape.

The speed of the magnetic on the other hand depends on the capacity of the individual drive which also depends on the cost.

Magnetic disk is commonly known as a hard disk or in some cases a hard drive which provides most of the secondary storage on the modern computers. Rotating drives which complete the formation of the magnetic disk are usually found in hard disk drives, floppy disks as well as optical disks like DVDs and CDs. The basic speed of the magnetic disk depends on its rotating drives commonly found starting at 4200 rpm going up to 15,000 rpm. Magnetic disks are non-volatile storage devices. This can be taken to mean that the memory does not need power to retain itself. Magnetic disks are not exactly portable because they are installed in computers but there is a perk as not much space is utilized by most.

Static RAM (Random Access Memory) (SRAM) and Dynamic RAM (DRAM), and Synchronous DRAM (SDRAM) can all be used whenever there is need to store secondary information/data. Memory access time has been a bottleneck in various microprocessor applications limiting the system performance. Memory controller (MC ) is designed and also built to attacking such a problem. The memory controller is the basic part of the system that usually controls the memory. The memory controller s thus integrated into the system chipset.

References

Sergei, S. (2002). Low temperature data remanence in static RAM. University of

Cambridge, Computer Laboratory.

Li, Huang, Shen, Chu (2010). “”A Realistic Evaluation of Memory Hardware Errors and

Software System Susceptibility”. Usenix Annual Tech Conference 2010″

Preston, P. (2001). “14: Register Files and Caches”. The Design of High Performance

Microprocessor Circuits. IEEE Press. p. 290.